APL is not dead, but not widely used either. It still has a big following for actuaries and similar data analysis.

I agree with you about it being "succinct, abstruse, impossible to read". I liken it to Egyptian Hieroglypics. A Rosetta Stone (the actual tablet, not the software) should be issued with every purchase.

Interestingly, there is an APL.NET.

>I worked (exclusively) for 30 years in a long-since dead language, APL.
>
>It was the most succinct, abstruse, impossible to read language you've ever seen.
>
>We used to say that the code was self-encrypting -- you couldn't read it yourself after five minutes.
>
>I'd have to give it top honors of the languages I have worked in.